Repeated calls to our home phone from this number identified on Caller ID as Meriden, CT. In general, no one responds when we answer, but then an automated voice says goodbye. When we try to call back, a recording states that this number is not in service. On a few occasions, when we answer calls from this number, a person with a heavy accent tries to sell us solar panels. When we do speak with a person, we ask them to remove us from their list and tell them that we are on the Do Not Call registry. They hang up on us, but call back in approximately an hour. How can we stop these calls???